He called him a hard throwing pebble, because he was so obstinate. He was constantly a self agrandiser.
John 1:42
42 And he brought him to Jesus. And when Jesus beheld him, he said, Thou art Simon the son of Jona: thou shalt be called Cephas, which is by interpretation, A stone.
In Greek it is stone in Hebrew and Aramaic it is rock, it was further translated into Peter.
Changing the names does not change the object.
Also
Mathew 16
19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.
Revelation 21:8
8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
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A totally wasted response!